cannot open files in Excel or Word

HELP PLEASE.
After repairing my XP Pro O/S with the original supplied CD, I have lost
Windows SP2, the start up is now very slow and I am unable to open any Excel
or Word file.
Clicking on any it brings "this file cannot be opened because your virus
scan has detected a problem with it".
I have run a virus test (negative) ,disabled the Antivirus Program, run file
repair in Word and Excel and re-installed Microsoft Office 2003 all to no
avail.
Where do I go next. I can`t afford to lose my files data.
Any advice greatly appreciated.
Ton

The FIRST thing to do is re-install Service Pack 2 (I hope you have a CD
with that update contained thereon since it is a huge download ).
Gene
"ton" <ton@discussions.microsoft.com> wrote in message
news:48099B55-1955-45D6-BC42-73DB786CC549@microsoft.com...
> HELP PLEASE.
> After repairing my XP Pro O/S with the original supplied CD, I have lost
> Windows SP2, the start up is now very slow and I am unable to open any
> Excel
> or Word file.
> Clicking on any it brings "this file cannot be opened because your virus
> scan has detected a problem with it".
> I have run a virus test (negative) ,disabled the Antivirus Program, run
> file
> repair in Word and Excel and re-installed Microsoft Office 2003 all to no
> avail.
> Where do I go next. I can`t afford to lose my files data.
> Any advice greatly appreciated.
> Ton